Wire brush



w. HALG WIRE BRUSH Sept. 25, 1962 Filed March 1, 1960 INVENTOR. WRQT'IR-m m MAM 0412 Aw-ralfllf United States Patent 3,055,034 WIRE BRUSH WalterHiilg, Kolliken, Aargau, Switzerland, assignor to WerkzeugburstenfabriirKullen & Co., G.m.b.H., Wurtternberg, Germany, a firm of Germany FiledMar. 1, 1960, Ser. No. 12,216 Claims priority, application Germany Nov.17, 1959 1 Claim. (1. 15197) The present invention relates to a handbrush with wire bristles as commonly used, for example, for brushingwelding seams, plaster, concrete, and the like, for cleaning tables,cutting blocks and the like in butcher shops, and for many otherpurposes.

In the wire hand brushes according to the known constructions, the wirebristles are always solidly embedded in the back of the brush. Themanner of securing the wire bristles of these known hand brushes alsoonly perrnits the use of relatively weak bristles, and the individualbristles may be easily bent and will then be useless.

It is an object of the present invention to provide a wire hand brushwhich overcomes the above-mentioned disadvantages by providing the wirebristles in the form of tufts of a number of bristles and twisting thebristles of each tuft together. The individual wires of such a twistedtuft may be made of any desired thickness and may be embedded in theback of the brush much more easily than a tuft of bristles which are nottwisted together. Such twisting of the bristles also produces theimportant advantage that the individual bristles within each tuft can nolonger be bent over or kinked since they will support or brace eachother.

Another disadvantage of the known wire hand brushes is the fact that theentire brush has to be discarded when the wire bristles have been wornoff, since there is no possibility of exchanging them for new bristles.

It is therefore another object of the present invention to provide ahand brush with exchangeable wire bristles.

This object is attained according to the invention by making the body orback of the brush of at least two parts which are removably secured toeach other, preferably by screws, and by providing the sides of theseparts which are facing toward each other with suitable recesses in whichthe twisted tufts of wire bristles are mounted. The individual twistedtufts are simply inserted with one end into the mentioned recesses inthe two parts, whereupon the latter are removably secured to each other,for example, by screws. When the wire bristles are worn off, the back istaken apart so that the old twisted tufts can be removed and replaced bynew tufts.

A very simple manner of securing the twisted wire tufts between the twoparts of the back of the brush consists according to the invention inmaking each tuft of wires of a substantially uniform length which arebent around their center to form an eye and are then twisted together.The end of the tuft containing the eye will therefore be thicker thanthe remainder thereof and can thus be more firmly embedded. Furthermore,this eye portion may be used for the insertion of a securing member, andfor this purpose a rod is passed through the eyes of several twistedwire tufts which are thus threaded thereon, and the ends of this Wireare mounted in grooves in the solid parts of the back of the brushadjacent to the ends of the recess in each back part containing thetufts.

These and other objects, features, and advantages of the presentinvention will become further apparent from the following detaileddescription thereof, particularly when the same is read with referenceto the accompanying drawings, in which FIGURE 1 shows a side view of thewire brush according to the invention;

3,055034 Patented Sept. 25, 1962 "ice FIGURE 2 shows an inside view ofone of the two main parts of the brush according to FIGURE 1;

FIGURE 3 shows an enlarged cross section taken along line III-III ofFIGURE 1;

FIGURE 4 shows an enlarged cross section taken along line IV-IV ofFIGURE 2; while FIGURE 5 shows an enlarged partial plan view of the backof the brush as seen from below.

Referring to the drawings, the brush according to the invention consistsof a body portion or back 1 which is provided with a handle 2 andcarries tufts 3 of bristles which consist of a plurality of metal wires4 which are twisted together. Depending upon the particular use of thebrush, the wire bristles may consist of different grades of steel,brass, or other metals, or a combination of several metals.

Each tuft 3 of bristles is preferably made of wires of approximativetwice the length as required for the entire tuft, and these wires arefolded over about their center so as to form an eye 4 at the center.Starting from this eye 4', the individual wires or bristles 4 are thentwisted together toward their ends so that a coherent body, namely thetuft 3, consisting of individual bristles 4 will be formed.

The back portion and the handle 2 of the brush together form a singleelement which, however, is divided in half in the longitudinal directioninto two sections 5 and 6 of equal lengths so that each of thesesections 5 and 6 forms one half of back portion 1 and one half of handle2. Each of the two halves of back portion 1 is provided with a similartrough-shaped recess 7 for receiving the eye-shaped ends 4' of tufts 3.As illustrated in FIGURE 2, the lower wall portion 8 of each recess 7 isprovided with semicircular grooves 9 for enclosing and gripping theround parts of tufts 3 underneath eyes 4', while in the wall portions 10and 11 at both ends of each recess 7 a groove 12 or 13, respectively, isprovided into which a rod 14 may be inserted which passes through eyes 4of tufts 3. Furthermore, section 5 is provided with threaded bores 15into which screws 16 may be screwed which are inserted into bores 17 insection 6 and are adapted to secure the two sections 5 and 6 to eachother and to grip tufts 3 at opposite sides thereof.

In the assembly of the brush, the required number of twisted tufts 3 arethreaded upon a rod 14 and inserted with the latter into one section ofback portion 1, for example, into section 5, so that the ends of rod 14engage into grooves 12 and 13, while the end portions of tufts 3adjacent to eyes 4 rest in the semicircular recesses 9. The othersection 6 is then placed upon the first section 5 and both sections aresecured to each other by screws 16. Tufts 3 will thereby be held on rod14 and securely clamped by the walls of grooves 9. If the tufts are wornoff, the two sections 5 and 6 may be easily unscrewed from each otherand the worn tufts be replaced by a set of new tufts.

Although my invention has been illustrated and described with referenceto the preferred embodiment thereof, I wish to have it understood thatit is in no way limited to the details of such embodiment, but iscapable of numerous modifications within the scope of the appendedclaim.

Having thus fully disclosed my invention, what I claim A wire brushcomprising a back portion and a plurality of tufts secured at one end tosaid back portion and each tuft consisting of a plurality of wirebristles twisted to gether to form a cablelike member, said back portionhaving a longitudinal extension thereon forming a handle and the handlebeing divided longitudinally into two substantially equal sections eachhaving a recess in the part 5 forming said back portion, lower wallportions in each section forming a row of substantially semicirculargrooves, said recesses in said two sections facing toward each otherwhen said two sections are placed on each other with opposite pairs ofwall portions abutting each other to form a closed chamber for holdingone end of each of said twisted tufts, the grooves in said walls facingtoward each other to surround and grip said tufts at a point near saidends, means for removably securing said two sections to each other andfor clamping said twisted tufts in a fixed position, the wire strands ofeach of said tufts being of a substantially uniform length and are bentover at their center to form an enlarged eye portion and are twistedtogether, and a rod inserted through all of said eye portions in a rowbehind each other, the end walls of each of said recesses having groovestherein for receiving the end of said rod and for 4 clamping said endsin a fixed position when said two sections are secured to each other.

References Cited in the file of this patent UNITED STATES PATENTS795,062 Pollman July 18, 1905 1,178,179 Rasmesen Apr. 4, 1916 1,359,104Rheinberger Nov. 16, 1920 FOREIGN PATENTS 105,493 Australia Oct. 1938885,468 France May 31, 1943 OTHER REFERENCES Modern Plastics, vol. 30,No. 12, August 1953, page 95.

